Evaluating the Influence of Momentary Cessation Mode in Inverter-Based Distributed Generators on Power System Transient Stability

Shin, Hyun Cheol; Jung, Jaeyeop; Oh, Sangwook; Hur, Kyeong; Iba, Kenji; Lee, Byongjun

doi:10.1109/pesgm41954.2020.9281463

Cited by 2 publications

(6 citation statements)

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“…The specific IBDG distribution sta- tus is described in Table 5. All IBDGs were connected to 22.9 kV buses and assumed to operate at unity power factor with specific parameters according to reference [15]. The fault scenario applied to each contingency set is as follows.…”

Section: Case Study On Korean Power Systemmentioning

confidence: 99%

“…The MC mode of IBDG affects stability margin computed by SIME method, which evaluates the ability of critical generators to remain in synchronism. In reference [15], the authors analysed that according to the contingency scenario and threshold voltage setting, the number of IBDGs that enter the MC mode varies, and this determines the equivalent reactance in the OMIB configuration. Eventually, the impact of the threshold voltage on the transient stability was analysed.…”

Section: Impact Of Recovery Ramp Rate After Momentary Cessation On Tr...mentioning

confidence: 99%

“…Zhu et al [14] addressed the impact of the MC mode and its recovery delay on the transient stability. Shin et al [15] analysed the impact of the MC threshold voltage on the power system transient stability. In addition, the authors addressed the direct impact of the MC mode on the stability margin and conducted a simulation on a Korean power system.…”

Section: Introductionmentioning

confidence: 99%

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Impact analysis of recovery ramp rate after momentary cessation in inverter‐based distributed generators on power system transient stability

Kang

Shin

Jang

et al. 2020

IET Generation Trans & Dist

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The global increase in the use of solar photovoltaics and wind turbines has led to a rapid increase in the penetration level of inverter-based distributed generators (IBDGs). Until recently, the operation modes of IBDGs under abnormal power system conditions were not a major concern owing to the small number of IBDGs used in power systems. However, several events have indicated that the momentary cessation (MC) mode of an IBDG can eventually deteriorate the stability of power systems. Among the various parameters that define the MC mode, the direct impact of the MC recovery ramp rate on the transient stability of the power system has been addressed by computing the stability margin based on a single machine equivalent method. Furthermore, this paper introduces the critical momentary cessation recovery ramp rate for a specific system, which can be used as an important index in the planning of an IBDG installation. Case studies on modified IEEE 39 bus system and Korean power system were conducted to validate the effectiveness of the proposed method.How to cite this article: Kang S, Shin H, Jang G, Lee B. Impact analysis of recovery ramp rate after momentary cessation in inverter-based distributed generators on power system transient stability. IET

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Section: Case Study On Korean Power Systemmentioning

confidence: 99%

Section: Impact Of Recovery Ramp Rate After Momentary Cessation On Tr...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact analysis of recovery ramp rate after momentary cessation in inverter‐based distributed generators on power system transient stability

Kang

Shin

Jang

et al. 2020

IET Generation Trans & Dist

Self Cite

View full text Add to dashboard Cite

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“…The first two methods are able to obtain a stable operation until there is an equilibrium point. Researchers in [18] studied the momentary cession capability of inverters and the undesirable effect of this capability on the transient stability is reported.…”

Section: Introductionmentioning

confidence: 99%

“…A serious issue in achieving the LVRT capability of grid connected converters is the stability. Different types of instabilities such as small signal and large signal (transient) are modelled and analysed in the literatures [12]. There exist a great deal of researches on the small signal stability of the grid connected DGs [13].…”

Section: Introductionmentioning

confidence: 99%

Improving synchronization stability of grid connected converters by virtual impedance

Abdoli

Gholipour

Hooshmand

2020

IET Generation Trans & Dist

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With the increasing penetration of inverter based distributed generation, recent grid codes do not permit the disconnection of converters as soon as fault happens. Considering the fact that electrical grids are not purely inductive, the grid connected converters face instability issues by fault occurrence. Converters applying Phase Lock Loop (PLL) are not able to synchronize with the weak grid during deep low voltage faults. This paper proposes a novel control strategy based on virtual impedance to maintain the synchronization of grid connected converters during heavy decrease of the grid voltage. Utilizing a virtual impedance and the measured current at the point of common coupling, the inverter can be virtually synchronized to a point which has a stronger connection. The virtual impedance can be a rough estimation of the line impedance or resistance from point of common coupling to the fault point. Furthermore, to avoid the need for impedance estimation, a simple technique is also proposed. Simulation results with MATLAB confirms the competence of the proposed method in improving the synchronization stability of the grid connected converters.

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Evaluating the Influence of Momentary Cessation Mode in Inverter-Based Distributed Generators on Power System Transient Stability

Cited by 2 publications

References 0 publications

Impact analysis of recovery ramp rate after momentary cessation in inverter‐based distributed generators on power system transient stability

Impact analysis of recovery ramp rate after momentary cessation in inverter‐based distributed generators on power system transient stability

Improving synchronization stability of grid connected converters by virtual impedance

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